PHILADELPHIA (AP) -- A commuter train has been halted on the Benjamin Franklin bridge heading from New Jersey into Philadelphia because of small fires along the track.

Spokesman Ed Kasuba of the Delaware River Port Authority says the fires were apparently caused by sparking from the shoe connecting the third rail and providing power. For that reason, power was shut down to the north side at about 3 p.m. and the PATCO high-speed train was stalled.

Kasuba says none of the 50 passengers on board was hurt, and officials are trying to figure out the best way to get the train moving again.

The track on the south side is now being used to handle traffic in both directions, causing delays of at least 15 minutes. Vehicle traffic into Philadelphia is also being delayed because only one lane is available due to the presence of fire department equipment>